David j



(No Model.)

D. J. SHELDRIOK.

DRIVE CHAIN.

"Patented July 15, 1890.

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I UNITED STATES I PATENT OFFICE.

DAVID J. SI-IELDRICK, OF COLUMBUS, OHIO, ASSIGNOR TO JOS. A. JEFFRY,

OF SAME PLACE.

ODRIVE-CHAIN.

SPECIFICATION forming part of Letters Patent No. 432,089, dated July 15, 1890. Application filed August 3, 1889. Serial No. 819,677. (No model.)

To all whom it may concern:

Be it known that I, DAVIDJ. SHELDnIoK, a citizen of the United States, residing at Golumbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Drive-Chains, of which the following is a specification, reference being had therein to the accompanying drawings.

Figure l. is a plan view. Fig. 2 is an edge IO view looking in the direction of the arrow, Fig. 1. Fig. 3 is an edge view of two links in position for uncoupling. Fig. 4 is a detached View of the two-partpintle. Fig 5 is a longitudinal section on line an ac, Fig. 3, look- I 5 ing in the direction of the arrow, Fig. 2. Fig.

6 is a section on line y y, Fig. 1.

In another application of mine, Serial No. 319,676, I have shown U-shaped links having tubular end bars provided with longitudinal grooves and circumferential chambers between their ends, the links being coupled to each other by means of pintles, each of which extends the entire length of the tubular end bar, with its ends projecting and engaging 2 5 with seats formed in the ends of the side bars of an adjacent link, and I do not claim such invention herein.

Like letters indicate like parts in all the figures.

The links of this chain are substantially U shaped, each having two side bars AB and a tubular end bar 0, these parts being cast integral with each other. Each side bar has at its end A a pintle-seat which is substan- 3 5 tially circular in cross-section, with anotch a. The tubular end bar has a similar pintle-seat with alongitudinal groove 1), and is also chambered or grooved internally and transversely, as at c. This chamber connects at one end with the longitudinal grooveb, and extends,by preference about three-quarters of the way around the pintle-seat. In coupling these U-shaped links to form a chain I propose using separate pintles, which can be thrust through the pintle-seats in the ends of the side bars andinto the tubular end bar of an adjacent link and form therewith close-fitting articulations, instead of the divided end bars or pintles which have heretofore been cast integral with the side bars, and which necessitated spreading apart the ends of the side bars to such .an extent that the inner ends of the pintles or divided end bars could pass over the outer ends of the tubular end bar by a sidewise movement and be afterward inserted by moving -5 5 the ends of the side bars inward, which operation of coupling necessitated either bending the side bar or making the tubular end bar in two parts with a hinge-like connection between them; and whereverl herein use the words U shaped link or side bars and tubular end bar I refer to a link having its side bars each united at one end with a single tubular end bar and integral therewith. So, also, whenever I use the word separable in connection with the word pintles I mean pintles which are separable from the side bars, which are at their free ends provided with seats adapted for the reception of the pintles.

The pintle is shown detached and partly broken away in Fig. i, and consistsof two separable parts, of which one may be a duplicate of the other, although by preference I form one part with a reduced portion E and the other part with a socket e to receive it, to insure that these parts shall always be in line with each other when the links are coupled together into a chain. Of course the form of these interlocking ends may be varied considerably; but in practice I prefer to make them about as shown.

Each part of the two-part pintle is provided at its outer end with a lateral or transverse projection, preferably in the form of a head D, adapted to overlap the adjacent ends A 'A of the side bars.

jecting lugs or spurs (1 cl; but the particu- 5 I lar form of these parts is not material.

The inner end of each pintle-section is provided with a radially-proj ecting part adapted to enter the chamber of the tubular sleevebar and to engage with the walls thereof when 1 0c in working position to prevent the pintlesections from moving outward.

By an examination of the drawings, par- Y ticularly Figs. 3 and 5, it will be understood that when two links are placed in about the position relative to each other which is indicated in Fig. 3 the notches A and longitudinal groove l3 register with each other, so that the pintles can be thrust in endwise until their inner ends interlock and the radial projections cl cl are in line with the chamber a. It now the links are straightened out, the engagement of the outer ends of the pintle with their seats in the ends A A of the side bars will rotate the pintle-sections and move the radial projection d d into the chamber C, so that it will be impossible to move either section outward, because any attempt so to do will cause the projections 61 d to engage with the side Walls of the chamber When the links are in any position other than that of Fig. 3. Of course the length of the chamber around the interior of the pintle-seat is such as to permit those projections to move freely Within such limits as will ordinarily be required in using the chain.

With the construction of parts shown such engagement of the radial projections (Z (Z with the walls of the chamber further insures that the overlappin projections at the outer ends of the pintle-sections shall support the free ends A A of the side bars against any outward strain, which would tend to spread them apart and oit from the ends of the pintle-sections.

Although I have shown the best mode known to me for the carrying out of my invention, I do not Wish to be limited thereby, because many modifications Will readily suggest themselves to any one skilled in the art of making drive-chains without departing from the spirit of my improvements.

What I claim is 1. In a drive-chain, the combination, with the side bars and the tubularendbarsprovided with internal chambers and with longitudinal grooves, of two-part separable pintles adapted to be inserted from opposite sides of the chain and provided with locking devices at their inner ends adapted to engage with the chambers of the tubular end bar, substantially as set forth.

2. In a drive-chain, the combination, with the sidebars and the tubular end bars provided with longitudinal grooves and a transverse chamber, of twopart separable pintles, each provided at its inner end with a radial projection adapted to be inserted through the longitudinal groove and to enter the transverse chamber, substantially as set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

DAVID J. SHELDRICK.

Witnesses:

E. E. OoRwIN, F. W. Wool). 

